期刊
ACS NANO
卷 2, 期 6, 页码 1305-1312出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn800045s
关键词
polymer nanocomposite; coarsening mechanisms; Ostwald ripening; coalescence; nanoparticle thin film; dodecanethiol desorption
Doclecanethiol-stabilized gold nanoparticles (5 nm diameter) are shown to self-organize to form a two-dimensional hexagonal structure in poly(methyl methacrylate) films upon spin-casting from solution onto a substrate, using high-angle annular dark-field scanning transmission electron microscopy. Through use of the distribution functions describing particle distributions, we show that the particle coarsening dynamics is self-similar, characterized by two distinct growth stages. During the initial stage, coarsening occurs via simultaneous Ostwald ripening and coalescence mechanisms, whereas during the second stage, the dominant coarsening mechanism is coalescence.
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